Let AudioCodingModule::SendCodec return Maybe<CodecInst>

webrtc/modules/audio_coding/main/test/TestAllCodecs.cc

 /*
  *  Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 459 matching lines @@
   std::ostringstream test_number_str;
   test_number_str << test_number;
   filename += "testallcodecs_out_";
   filename += test_number_str.str();
   filename += ".pcm";
   outfile_b_.Open(filename, 32000, "wb");
 }
 
 void TestAllCodecs::DisplaySendReceiveCodec() {
   CodecInst my_codec_param;
-  acm_a_->SendCodec(&my_codec_param);
-  printf("%s -> ", my_codec_param.plname);
+  printf("%s -> ", acm_a_->SendCodec()->plname);
   acm_b_->ReceiveCodec(&my_codec_param);
   printf("%s\n", my_codec_param.plname);
 }
 
 }  // namespace webrtc